Demountable knob and cylinder lock



Juy 9, 1935. vv. R. sca-:LAGE

DEMOUNTABLE KNOB AND CYLINDER LOCK 2 Sheets-Sheet l Filed Jan. 9, 1929 A TTORNEYS.

July 9, 1935. w. R. scHLAGE 2,0075350 l DEMOUNTABLE KNOB AND CYL-INDER LOCK Filed Jan. 9, 1929 2 Sheets-Sheet 2 i INVENTOR. m75.

A TTORNEYS.

Patented July 9, 11935 ori-*lcs nEr/roUNTABLE KNOB AND CYLINDER y ,Loox

`ifi/'alter It. Schlager-San Francisco, Cal-if., as-l signorl to SchlageLock Co., San Francisco, Calif., a corporation of `California K Application January 9, 192.9,HSerial No. 331,322

This invention relates to a demountablfe knob@ and cylinder lock ior doorlocks and the like, and especially to a structure whereby .thecylin-- der lock and the knob are 'removably securedl 145-. and locked by key actuated mechanism'with re` lation to the spindle of a door lock. Y The object of the present invention is to generally improve and simplify the construction and operation of door locks; to provide a key actu# 1Q,` ated locking cylinder which is adapted `to be secured and locked in theouter end of a spindl'el by means of .a key actuated mechanism; to pro vide a key actuated lockingcylinder which is reversible with relation to the Aspindle to nt right and left hand doors, and 'which is adapted to be `locked against removal4 in either position by means of the key actuated mechanism; to provide a demountahle knob for. housing and enclosing the cylinder lock; to provide means for securing theknob against accidental removal, and further to provide meanswhereby saidv knob securing means may be locked byA key actuated mechanism to` prevent removal ofthe knob; The invention is shown by'way ofillustration in the vaccompanying drawings, in which" Fig. l is a central vertical longitudinal'section of` a door knob and spindle, said view showing va cylinder look within the spindle, UFig. 2 is a cross section Vtaken on line II-II of 3Q Fig. l,

Fig. 3 is a section similar to at right angles thereto,

Fig. ibut taken Fig. 4 is a cross section taken online of Fig. 3, y Y t A i Fig. 5 is a perspective View of the cylinder lock, Fig. 6 is a perspective view of the main spindle, Fig. 7 is a perspective view of the auxiliary spindle, Y f Y Y Fig. 8 is a perspective view of theknobsecur- Fig. 9 is a perspective view oiV the inner .end

of the knob, Y

Fig. 10 is a perspective View 0f the blank Yfrom which the main spindle is formed, f

Fig. 11 is a perspective View of the'main spindie, said view being'l partially in'section, and the section beingltaken on line XI-XL Fig. 6.

Referring tothe drawingsin detail, particularly Figs. l, 5, 6 and '7, A indicates a tubular spindle uponwhich is mounted av knob B.V The lknob may be cast, or otherwise formed.` Onlthe Ainner face of the knob is an annular recess or lshoulder 2, and a vertical disc shaped face `3 which terminates inthe hub member The disc is slotted, as indicatedat @and thehub'is `ends of these slots terminate in inwardly proslotted longitudinally, as indicated at B. The hub is also provided with a pair of circumferential `or oppositely disposed slots, indicated at 'l and "la, for purposes hereinafterv to be described. The spindle is formed from a blank, such as 5 shown in Fig. 10. This blank is rolled or formed into a tubular spindle such as shown in Figs. 6 and 1l, and when so rolled, a longitudinal'slot isformed, as indicated at 8. A second pair ofv slots are formed, as indicated at 9 and the inner jecting'lugs I0. The inner end of the spindle is provided with Va roll-back member II, and one edge of theblank is'provided with three. lugs, such as indicated at I2, I3 and I4. These lugs are clearlyshown in Figs. 6, 10 and 11.

When the plate, or blank shown in Fig. 10 is rolled or'formed, the'longitudinal slot 8 is nrst produced and the lugs I2, I3 and I 4 are then bent toassumethe position shown in Fig. 11, the lugs forming a support and retainer for a spring wire I5. This wire is hook-shaped at one end, as shown at I6 to engage the under surface, of the lug I2. It passes over or on top of the "lug I3v and the opposite end of the spring is then passed through a perforation I 6, which is formed on the latchmember I1. Y'I'his latch member is guided Aby the forward surface of the lug I4 and by slots' AIlla and I 4b formed in opposite sides of the slot 8, the latch member being best illustrated in Fig. 8. Y

The latch member serves the function of securing the knob against endwise movement on the spindle,Y and for this, reason normally projects through Yone or another'of the slots 'I or la formed'in the hub of the knob, and which also projects through a slotlb formed in the `hub portion I8 of an inner cover plate I9. If it is desired to release the inner cover plate and the knob so as tov permit removal of the knob with40 relation to the spindle it is only necessary to depress the latch member Il, by means of a screw `driver 'or the like. When the latch member is so depressed the knob and inner cover may be removed by sliding them longitudinally on the spindle. y'

' The main spindle also vserves as a support and retainer for acylinder lock, such as shown in Fig. 5. The cylinder lock illustrated may be one orlanother of the pin tumbler types. It con` sists'of a cylindrical housing 2U, provided with a rectangular extension 2I which houses the spring actuated pin tumblers. It is also provided with the usual cylinder plug, not shown, and a cam plate 22 whichvisadaptedto be rotated thereby. 55

The front end of the plug is provided with the usual key opening, through which the key may be inserted, such as shown at 23, and when the key is inserted and rotated, cam plate 22 will also be rotated as it is attached to the plug. The exterior diameter of the cylinder lock 20 is equal to the interior diameter of the tubular spindle A, hence it may be inserted endwise in the outer end of the spindle. When so inserted the housing extension 2| will project through one or another of the longitudinal slots 9 formed in the spindle, and as there arek two slots 9 it is possible to reverse the cylinder lock so as to iit right or left hand doors.

In order to secure the cylinder lock against removal with relation to the spindle, the lugs I0 are provided. These lugs abutv the inner shoulder 24 of the cylinder lock, and the end 25 of the housing extension 2| when the cylinder lock is inserted, and the lugs form an interlock with the shoulders of the cam plate 22 when this is rotated to assume the position shown in Figs. 1 and 5. That is, the cam plate"22 is provided with two opposite recesses or slots; such as shown at 21 and 28. `When these slots align with Ythe shoulder 24 and the end 25 of the housing, lugs I0 will pass through the slots 21 and 28 and will abut the shoulders 24 and 25 and when the cam plate is rotated 90, the portions of the cam plate indicated at 29 will engage the lugs I0 and the cylinder lock is thus secured against endwise' removal with relation tothe spindle.

The cylinder lock, as previously stated, is key actuated and it serves three main functions, rst that of locking the cylinder lock against removal with relation to the spindle A, secondly that of locking the spring actuated latch member I1 against depression, and third that of actuating an auxiliary spindle suehas shown at C in Fig. 7. This spindle is mounted within the main spindle and it is provided with a roll back I Ia at one end which functions in the same manner as the roll back II. The inner end of the auxiliary spindle is provided with a down-turned end 33 on which is formed a down-turned central lug 3| and a pair of right angular lugs 32 and 33. The lugs 32 and 33 project into a slot 34 formed in the cam plate 22, while the lug 3| normally assumes a position in alignment with the inner end of the spring latch member I1. Hence, when the key actuated mechanism in the`cylinder lock and the cam plate 22 assumes a locked position lug 3| aligns with the spring latch member I1, thereby securing said latch against depression, and the knob against removal. At this time the lugs I0 are also locked, and key actuated means have hence been provided whereby the cylinder lock and the knob are locked against removal with relation to the spindle. If the key is inserted and the cam plate rotated, a rotary mo,- tion will be transmitted through the slot 34, and lugs 32 and 33 to rotate the auxiliary spindle C, hence making it possible to open the door by means of the key and the rollback II a.

The locking mechanism illustrated is particularly intended for apartment houses, oice buildings, at apartments and the like where it is desirable to facilitate changesin the keying of a single lock or a group of locks, when tenant changes occur. To provide `for such changes, the janitor or the superintendent may be provided with an extra supply of cylinder locks, at small expense, which may be interchanged from time to time, or he may` merely remove a cyl- Ainder lock and change the combination.

When an apartment is rented to a new tenant he naturally wants to feel sure that the door cannot be opened by a key that a former tenant or one of his employees has carried away with him. He receives this assurance when the superintendent or janitor detaches the knob and either replaces the cylinder lock, or changes the combination thereof and then gives the tenant a new key which will only operate the new combination.

The method of accomplishing the change will be as follows:

The building superintendent inserts the key 23 and rotates the cam plate until the lug 3| moves out of alignment with the spring latch member I1. He then depresses the spring latch 1 by means of a screwdriver or the like, thus making it possible to remove the knob and the inner cover I9. After the knob has been removed, he again inserts the key and rotates the cam plate until the notches 21 and 28 register with the lugs I0. He then pulls outwardly on the key and as the interlock between the cylinder and the lugs I!! has been broken, the cylinder will be removed from the spindle. He may replace the cylinder with a new one, or he may change the combination of the tumblers. When this is accomplished it is reinserted and locked in position with relation to the lugs I0 by slightly turning the cam plate 22. He next applies the inner plate I9 and the knob and when the slots 1 and 1b register with the spring latch member, this will be automatically projected and will secure the knob and inner plate against endwise movement. Further rotation of the cam plate will bring the lug 3| into alignment with the spring latch member, and itis then key locked against depression. Hence, it will be impossible for any one unauthorized to either remove the knob or the cylinder lock without possession of the proper key. It will furthermore be noted that a master key becomes entirely unnecessary and may be dispensed with.

While certain features of the present invention are more or less specifically described, I wish it understood that various changes may be resorted to within the scope of the appended claims, similarly, that the materials and finishes of the several parts employed may be such as the manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. The combination with the spindle in a lock of a knob on the spindle, a depressible latchv member for securing the knob on the spindle, and rotatable key actuated means for locking the latch member against release.

2. The combination with the spindle in a lock of a knob on the spindle, a releasable latch carried by the spindle and extending radially through a shank on the knob to secure the knob against endwise removal from the spindle, and means securing the latch against release.

3. The combination with the spindle in a lock oi! an endwise removable knob on the spindle, a releasable latch member securing the knob against endwise removal from the spindle and key actuated means for locking the latch member against release.

4. The combination with a spindle in a lock yof a lock housing insertible in the spindle, and key actuated means in said housing for locking the housing against removal with relation to the spindle.

5. The combination with a spindle in a lock o! a lock housing mserubie in the spindle, said housing being reversible with relation to the spindle,

and key actuated means in said housing for locking the housing against removal with relation to the spindle inv either of its positions.

6. 'I'he combination with a spindle iny a lock of a lock housing insertible in the spindle, a demountable knob on the spindle andenclosing the spindle and the lock housing, releasable means securing the knob against removal from the spindle andV key actuated means in the lock housing for locking the releasable means against release.

'7. The combination with a spindle in a lock of a lock housing insertible-in the (spindle, a demountable knob on the spindle and enclosing the spindle and the lock housing, releasable means securing the 'knob against removal from the spindle, key actuated means in the lock housing for 'of the spindle, a cam member on the cylinder, a

lug on the spindle with which the cam is adapted to be interlocked, and key actuated means in the y cylinder for turning the cam into or out of engagement with relation to the lug to lock or release the cylinder lock with relation to the spindle. Y

9. The combination with a spindle and a lock and a knob'on the spindle, of a lock housing disposed within the knob, a radially depressible latch member normally engaging the knob and securing the knob and the lock housing against endwise removal from the spindle, said latch member being accessible from the exterior of the knob, and key actuated means whereby rotation of the key to a predetermined position will render the latch member depressible from the exterior of the knob and the knob and lock housing removable.

10. 'Ihe combination with a tubular spindle in a lock, of an endwise removable knob on the spindle, 'a depressible latch member normally securing the knob against endwise removal from the spindle, said latch member being depressible from the exterior of the knob, and selective means in the spindle cooperating with the latch member whereby manipulation of said selective means Will render the latch Vmember either depressible or not depressible.

WALTER R. SCHLAGE. 

